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Quantum-Dot-Induced Cesium-Rich Surface Imparts Enhanced Stability to Formamidinium Lead Iodide Perovskite Solar Cells

Release time:2024-08-09 Hits:

Affiliation of Author(s):

材料科学与工程学院

Journal:

ACS Energy Letter

Abstract:

The stability of formamidinium lead iodide (FAPbI3) perovskites is generally improved by incorporating cesium (Cs) into the crystal structure. However, the effectiveness of this approach is limited by the intrinsically low solid-solubility of Cs in bulk FAPbI3. To circumvent this issue, we demonstrate a method that entails solution-deposition of high-Cs-content Cs1–xFAxPbI3 alloy quantum dots (QDs) onto a bulk Cs-lean FAPbI3-based thin film. This results in a thin film with a Cs-rich QD surface layer, which stabilizes the thin film against the ambient environment. Stable, efficient perovskite solar cells based on these new thin-film structures are demonstrated.

Note:

有

First Author:

quemeidan

Indexed by:

Journal paper

Volume:

2019, 4, 8, 1970-1975

ISSN No.:

2380-8195

Translation or Not:

Date of Publication:

2019-07-18

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